Micro Mod 53SL5100B User manual

Micro-DCI Single-Loop Controller Instruction Manual
53SL5100B

53SL5100B Single-Loop Controller
INSTRUCTION MANUAL
MicroMod Automation & Controls, Inc.
The Company
MicroMod Automation & Controls is dedicated to improving customer efficiency by providing the most cost-effective, application-specific
process solutions available. We are a highly responsive, application-focused company with years of expertise in control systems design
and implementation.
We are committed to teamwork, high quality manufacturing, advanced technology and unrivaled service and support.
The quality, accuracy and performance of the Company's products result from over 100 years experience, combined with a continuous
program of innovative design and development to incorporate the latest technology.
Use of Instructions
Note. Clarification of an instruction or additional information.
Warning. An instruction that draws attention to the risk of
injury or death.
!Caution. An instruction that draws attention to the risk of
the product, process or surroundings.
iInformation. Further reference for more detailed information
or technical details.
Although Warning hazards are related to personal injury, and Caution hazards are associated with equipment or property damage, it
must be understood that operation of damaged equipment could, under certain operational conditions, result in degraded process system
performance leading to personal injury or death. Therefore, comply fully with all Warning and Caution notices.
Information in this manual is intended only to assist our customers in the efficient operation of our equipment. Use of this manual for any
other purpose is specifically prohibited and its contents are not to be reproduced in full or part without prior approval of MicroMod
Automation & Controls, Inc.
Licensing, Trademarks and Copyrights
MOD 30 and MOD 30ML are trademarks of MicroMod Automation & Controls, Inc.
MODBUS is a trademark of Modicon Inc.
Health and Safety
To ensure that our products are safe and without risk to health, the following points must be noted:
The relevant sections of these instructions must be read carefully before proceeding.
1. Warning Labels on containers and packages must be observed.
2. Installation, operation, maintenance and servicing must only be carried out by suitably trained personnel and in accordance with the
information given or injury or death could result.
3. Normal safety procedures must be taken to avoid the possibility of an accident occurring when operating in conditions of high
pressure and/or temperature.
4. Chemicals must be stored away from heat, protected from temperature extremes and powders kept dry. Normal safe handling
procedures must be used.
5. When disposing of chemicals, ensure that no two chemicals are mixed.
SAFETY ADVICE CONCERNING THE USE OF THE EQUIPMENT DESCRIBED IN THIS MANUAL MAY BE OBTAINED FROM THE
COMPANY ADDRESS ON THE BACK COVER, TOGETHER WITH SERVICING AND SPARES INFORMATION.

53SL5100B Single-Loop Controller
INSTRUCTION MANUAL
1INTRODUCTION ......................................................................................................................................... 1
1.1 PRODUCT OVERVIEW .............................................................................................................................. 1
1.2 SPECIFICATIONS ..................................................................................................................................... 2
2INSTALLATION........................................................................................................................................... 5
2.1 INSPECTION ............................................................................................................................................ 5
2.2 LOCATION............................................................................................................................................... 5
2.3 MOUNTING.............................................................................................................................................. 5
2.3.1 General.......................................................................................................................................... 5
2.3.2 Mounting Procedure ...................................................................................................................... 6
2.4 POWER &SIGNAL WIRING ....................................................................................................................... 9
2.4.1 Power Wiring ............................................................................................................................... 12
2.4.2 Field Signal Wiring ...................................................................................................................... 12
2.4.3 Datalink Communication ............................................................................................................. 13
2.5 FACTORY SET CALIBRATION .................................................................................................................. 13
2.6 GROUNDING ......................................................................................................................................... 13
3FRONT PANEL ......................................................................................................................................... 15
3.1 DISPLAY ............................................................................................................................................... 15
3.2 FRONT PANEL PUSHBUTTONS................................................................................................................ 19
3.3 DISPLAYING A DATAPOINT ..................................................................................................................... 21
3.4 ALTERING A DATAPOINT ........................................................................................................................ 22
3.5 DEFAULTING THE DATABASE.................................................................................................................. 23
3.6 RESPONDING TO THE PROMPT:KEY?.................................................................................................... 25
4CONFIGURATION PARAMETERS .......................................................................................................... 27
4.1 DATAPOINT TYPES ................................................................................................................................27
4.2 FACTORY STANDARD CALIBRATION ........................................................................................................ 27
4.3 CONFIGURING THE DATABASE MODULES................................................................................................ 28
5SINGLE LOOP (PID) CONTROLLER....................................................................................................... 37
5.1 OPERATION OVERVIEW ......................................................................................................................... 37
5.2 SINGLE LOOP CONTROLLER FRONT PANEL PUSHBUTTONS ..................................................................... 40
5.3 SINGLE LOOP CONTROLLER PARAMETER SELECTIONS............................................................................ 42
5.3.1 Abbreviated Configuration Tables............................................................................................... 43
6ANALOG BACKUP CONTROLLER......................................................................................................... 45
6.1 ANALOG BACKUP CONTROLLER OPERATION OVERVIEW.......................................................................... 45
6.2 ANALOG BACKUP CONTROLLER FRONT PANEL PUSHBUTTONS ................................................................ 47
6.3 ANALOG BACKUP CONTROLLER PARAMETER SELECTIONS ...................................................................... 49
6.4 ABBREVIATED CONFIGURATION TABLES ................................................................................................. 50
7RATIO (PID) CONTROLLER .................................................................................................................... 53
7.1 RATIO (PID) CONTROLLER OPERATION OVERVIEW................................................................................. 53
7.2 RATIO (PID) CONTROLLER FRONT PANEL PUSHBUTTONS ....................................................................... 55
7.3 RATIO CONTROLLER PARAMETER SELECTIONS....................................................................................... 57
7.4 ABBREVIATED CONFIGURATION TABLES ................................................................................................. 58
8AUTOMATIC/MANUAL STATION............................................................................................................ 61
8.1 AUTOMATIC/MANUAL STATION OPERATION OVERVIEW............................................................................ 61
8.2 AUTOMATIC/MANUAL STATION FRONT PANEL PUSHBUTTONS.................................................................. 63
8.3 AUTOMATIC/MANUAL STATION PARAMETER SELECTIONS ........................................................................ 65
9PARAMETER DISPLAY ........................................................................................................................... 67
9.1 PARAMETER DISPLAY CONFIGURATION SETTINGS................................................................................... 69

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INSTRUCTION MANUAL
10 INSTRUMENT TUNING ......................................................................................................................... 71
10.1 PROPORTIONAL ACTION (PB)................................................................................................................. 71
10.2 INTEGRAL ACTION (TR).......................................................................................................................... 71
10.3 DERIVATIVE ACTION (TD) ...................................................................................................................... 71
10.4 INSTRUMENT TUNING ............................................................................................................................. 72
11 EASY-TUNE ........................................................................................................................................... 75
11.1 GENERAL CONSIDERATIONS................................................................................................................... 75
11.2 INITIATING THE EASY-TUNE SEQUENCE ............................................................................................... 75
11.3 EASY-TUNE PARAMETERS .................................................................................................................. 76
11.4 EASY-TUNE SEQUENCE STATUS ......................................................................................................... 77
11.5 MODIFICATIONS TO TUNING CRITERIA ..................................................................................................... 79
11.6 ABORTING THE EASY-TUNE SEQUENCE ............................................................................................... 81
11.7 EASY-TUNE SEQUENCE COMPLETION.................................................................................................. 81
12 MAINTENANCE ..................................................................................................................................... 83
12.1 SERVICE APPROACH.............................................................................................................................. 83
12.2 PARTS REPLACEMENT ........................................................................................................................... 83
12.3 CALIBRATION......................................................................................................................................... 84
12.4 ERROR AND HARDWARE MALFUNCTION MESSAGES ................................................................................ 84
12.5 RESETTING THE INSTRUMENT................................................................................................................. 84
12.6 PARTS LIST ........................................................................................................................................... 86
APPENDIX A: DISCRETE CONTACT OUTPUT CCO’S ................................................................................. 90
APPENDIX B : COMMUNICATIONS ............................................................................................................... 94
APPENDIX C: DATABASE ............................................................................................................................101

53SL5100B Single-Loop Controller
INSTRUCTION MANUAL
IMPORTANT NOTICE
All software, including design, appearances, algorithms and source code is copyrighted by MicroMod
Automation & Controls, Inc. and is owned by MicroMod or its suppliers.

53SL5100B Single-Loop Controller
INSTRUCTION MANUAL
1 INTRODUCTION
1.1 Product Overview
The 53SL5100 Controller is capable of functioning as any one of four selectable application-specific
instruments. The instrument application is selected with the front panel push buttons by entering the
appropriate number (1 through 4 respectively) into a designated database location. The four instrument
selections are:
1. Single Loop (PID) Controller - a PID controller that fulfills the requirements of a majority of process
applications. It is used with other devices in a standard feedback control loop to automatically control
a process variable (PV) at a predetermined setpoint (SP). The proportional, integral, and derivative
(PID) terms can be activated as needed.
2. Analog Backup Controller - for operations requiring computer backup. It is used where a remote
computer is normally controlling the final element directly. In this configuration, the controller acts as a
control signal selector and as an automatic backup to the computer. The controller continually adjusts
its output to match the feedback signal from the final element so that transfer to on-line operation is
bumpless.
3. Ratio (PID) Controller - for applications where one variable must automatically be maintained in
definite proportion to another variable. The PID algorithm is executed to maintain a controlled line at a
predetermined proportion to the uncontrolled or wild line.
4. Automatic/Manual Station - for installations requiring a single station automatic/manual selector. In
Auto, the Auto input is passed directly through the station to the output. In Manual, the station acts as
a manual loader for direct operator control of the process.
Each of the four instrument selections has its own unique display of process attributes (e.g., process variable,
output, etc.) as well as a supplemental parameter display that is invoked by pressing a front panel push
button. The parameter display provides quick access to view and/or alter three values such as % Proportional
Band, Reset (integral action), and Rate (derivative action). The instrument is configured at the factory to
display these three values, but the parameter display selections can be altered.
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INSTRUCTION MANUAL
1.2 Specifications
Item Specification(s)
Power
Range (as specified in model number) 22 - 26 V dc
108 - 132 V rms
216 - 264 V rms
50/60 Hz
Power Consumption (ac/dc operation) 36 VA maximum
Internal Power Supply:
Available Power Output for Transmitters
25 V dc ± 1 V dc @ 80 mA maximum, short circuit protected.
Output Ripple 200 mV p-p maximum
Analog Input (ANI0, ANI1) Signals (all analog in-puts are referenced to signal common)
Quantity 4 (ANI0, ANI1)
Signal Range 0 -5 V dc or 1 -5 V dc (0 -20 mA and 4 -20 mA dc respectively).
NOTE: The rear terminal board has the appropriate resistors for
ANI0 and ANI1.
Input Impedance 1 megohm minimum for voltage inputs; value of ranging resistor for
current signals.
Measurement Accuracy ± 0.1% of span
Contact Input CCI0 Signal (referenced to power common)
Quantity 1 (CCI0)
Type discrete input
Permitted Contact Resistance 100 ohm maximum
Open/Close Contact Duration for open recognition: 0.05 seconds minimum
for closed recognition: 0.05 seconds minimum
Contact Recognition Level Closed 1 V dc maximum
Contact Recognition Level Open 4 V dc to 24 V dc
Analog Output (ANO0) Signal (referenced to power common)
Quantity 1 (ANO0)
Signal Range 0 -20 mA dc (4 -20 mA dc typically)
Load Range 0 - 750 ohms
Accuracy ± 0.2% of span
Switch Output (CCO0) Signal (referenced to power common)
Quantity 1 (CCO0)
Type solid state switch output
Configuration solid state equivalent of a single pole single throw, normally open or
normally closed contacts referenced to common.
Voltage 30 V dc maximum
Current 50 mA dc maximum
Datalink Communication RS485, four wire, asynchronous; baud rates 300 to 28,800
Sampling and Update Attributes
Program Scan Rate 0.05 seconds
Analog Input Signal Sampling Rate 0.05 seconds
Contact Input Signal Sampling Rate 0.05 seconds
Display Update 0.10 seconds
Output Signal Update 0.05 seconds
Control Ranges
Proportional Band 2 - 1000% and OFF
Integral 0.02 -200 minutes/repeat or Manual Reset from 0-100%
Derivative 0.01 - 8 minutes and OFF
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Item Specification(s)
Environmental Characteristics
Controlled Environment Enclosed temperature controlled location (Class A and B per ISA-
S71.01 1985)
Ambient Temperature Limits 4 -52°C (40 - 125°F)
Relative Humidity Limits 10 - 90% maximum
Temperature Effects on Accuracy ± 0.28% per 28°C (50°F) change from reference temperature 25°C
(77°F)
Transient Immunity (all circuits) ANSI C37.90a - 1974/IEEE Std 472-974: Ring Wave: 1.5 MHz, 3 kV,
60 pulses/s for 2.0 s
EMI Susceptibility SAMA PMC 33.1-1978: Class 3-abc: no effect at 30 V/m, at 27, 146,
and 446 MHz
Enclosure Classification/Environment Panel Mounted Equipment: No enclosure rating. Designed to be
installed in a user provided panel or enclosure.
Rated for installation in a Pollution Degree 2 location per U.L. 508-
1989/Controlled Environment per CSA C22.2 No. 142-M1987. An
indoor, temperature controlled location (Control Room or Shop Floor)
where normally, only non-conductive pollution occurs; however,
temporary conductivity caused by condensation may be expected.
Location in environments more severe than those stated requires
supplementary protection
Shock 0.5g
Vibration SAMA PMC 31.1-1978; point-to-point constant displacement 0.05 in.
(1.27 mm), 5 -14 Hz: 0.5 g, 14 - 200 Hz.
Drop and Topple SAMA PMC 31.1-1978; Tilt 30 degrees from horizontal and fall freely
to a hard surface, all sides, front and back.
Safety Classification General Purpose: Complies with ANSI/ISA S82.01-1988, Safety
Standard for Electrical and Electronic Test Measuring, Controlling and
Related Equipment; General Requirements and S82.03-1988 Safety
Standard for Electrical and Electronic Test, Measuring, Controlling and
Related Equipment; Electrical and Electronic Process Measurement
and Control Equipment.
FM Approved: Nonincendive for Class 1, Division 2, Groups A, B, C, &
D, Temperature Code T3C 160 ° C.
Physical Characteristics
Material of Construction:
Case Steel, black enamel
Circuit Boards Glass epoxy
Bezel ULTEM 1000 (Polyethermide Resin) Flammability-UL94 5V
Dimensions 2.844W x 5.656H x 12.906L (inches) 73W x 144H x 329L (mm)
Flush Panel Mounting 0.125 inch - 1 inch thickness (3.2 mm - 25.4 mm)
Electrical Connections Screw type terminal block at rear of casework
Weight 5 lbs (2.3 kg)
Front Panel Display 96 x 48 dot addressable
Front Panel Push Buttons 10 membrane type switches
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INSTRUCTION MANUAL
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2 INSTALLATION
2.1 Inspection
A list of all items in the shipment is attached to the shipping container. Inspect the equipment upon arrival for
damage that may have occurred during shipment. All damage claims should be reported to the responsible
shipping agent before installation is attempted. If damage is such that faulty operation is likely to result, the
MicroMod Customer Service Department should be notified.
Inspect the packing material before discarding it as a precaution to prevent loosing mounting hardware or
special instructions that may have been included with the shipment. Normal care in the handling and
installation of this equipment will contribute toward its satisfactory performance.
2.2 Location
The 53SL5100 is supplied with an enclosure designed specifically for indoor mounting. The installation site
selected should be dry, well lighted, and vibration free. The ambient temperature should be stable and
maintained within the specified minimum and maximum temperature limits listed in the Section 1,
specifications of this Instruction Bulletin.
The instrument can be supplied for use with a 24 V dc supply or 120, 220 and 240 V ac line service.
Instrument power requirements are given on the instrument data tag.
2.3 Mounting
2.3.1 General
It is normally not necessary to open the instrument case during installation. If the instrument must be removed
from the case, refer to Section 5 for details. Incorrect procedures may damage the instrument.
The instrument can be flush panel mounted, either as a single unit or side by side. Appropriate mounting
hardware is supplied. Outline dimensions and panel cut-out requirements for case mounting are shown in
Figure 2-1.
The dimensions given for spacing between instruments were selected on the basis of 1/8" thick panel
strength. Panel strength must be considered when multiple case mounting is required. As the panel cut-out
becomes longer it may be necessary to install supporting members. Because the panel area between
instrument rows becomes weaker as the cut-out becomes longer to the point where the panel offers very little
support. It is recommended that the 9 inch minimum center line dimension between horizontally mounted
rows be increased as the number of units increases, or that the panel strip be stiffened.
The rear of the instrument case must be supported to prevent panel distortion. Mount an angle iron or similar
member along the bottom of the cases as indicated in Figure 2-2. If the panel is to be moved the instrument
cases must be tied down to prevent damage.
If multiple mounted instruments are installed in a panel that tilts back, it may be necessary to support the
instruments so the panel does not sag. The downward weight should be supported by additional panel
supports and/or by increasing panel thickness.

53SL5100B Single-Loop Controller
INSTRUCTION MANUAL
2.3.2 Mounting Procedure
For single and multiple case mounting the instruments are furnished with a trim collar (mounting frame).
Figure 2-2 illustrates the installation and use of the trim collar (mounting frame). Trim collars (mounting
frames) are available in various sizes and are supplied to conform with the particular panel cut-out.
NOTE: Mounting brackets and trim collars (mounting frames) are packaged separately. Check the
shipment carefully to prevent loss of mounting hardware.
To install single or multiple mounted instruments in a prepared panel cut-out, proceed as follows:
1. Remove the through-case shipping bolt.
2. Slip the trim collar (mounting frame) over the rear of the case and slide it forward to the front of the
case.
3. Slide the instrument case through the panel opening.
a. Single mounting case - support the weight of the case and attach the top and bottom
mounting brackets. Tighten the bracket screws.
b. Multiple mounted cases - spacer bars and self-adhesive pads must be used between the
cases, as shown in Figure 2-3. Start the installation from the right (when facing the panel),
installing the spacers as each case is added. Also, as each case is positioned in place, install
and tighten the top and bottom mounting brackets. Each case must be tight against the
previous case.
NOTE: Spacers are not required on the outside of the right and left cases.
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INSTRUCTION MANUAL
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Figure 2.1 Outline Dimensions & Panel Cut-out Requirements
NOTES:
1. DIMENSIONS ARE IN INCHES. DIMENSIONS IN BRACKETS (
) ARE IN MILLIMIETERS.
2. DIMENSIONS GUARANTEED ON CERTIFIED PRINTS ONLY.
3. CASE MOUNTING HARDWARE SUPPLIED UNLESS
OTHERWISE SPECIFIED.
4. THIS DRAWING IS THIRD-ANGLE PROJECTION AS SHOWN
5. UNLESS OTHERWISE INDICATED ALL TOLERANCES ARE ±
1/16 (1.6)

53SL5100B Single-Loop Controller
INSTRUCTION MANUAL
Figure 2-2. Single or Multiple Panel Mounting
Figure 2-3. Intercase Spacing
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2.4 Power & Signal Wiring
PREPARATORY: The 53SL5100 can be configured for one to four analog inputs (ANI0-3), one analog output
(ANO0), two control contact inputs (CCI0 and 1), two control contact outputs (CCO0 and 1) and Datalink
network interconnectivity. Therefore, prior to making electrical connections, the particular instrument
configuration should be determined with all assigned inputs and outputs identified to assure proper signal
routing.
Provisions for electrical interconnections are located at the rear of the instrument case. Under ideal conditions
shielded cable may not be required. In noisy locations all system input, output and power wiring should be
enclosed in electrical conduit. System interconnection cables (except for power cables) should be fabricated
from 2-wire shielded signal cable. Signal transmission distance should not exceed the limit specified for the
particular transmitter (refer to applicable technical literature provided for the respective device). Polarity must
be observed when connecting the remote transmitters to the instrument.
The instrument has a vertically mounted terminal strip (TB1) for signal interconnections and a horizontally
mounted terminal strip (TB2) for power wiring. Both terminal strips are located at the rear terminal board of
the instrument case.
SNAP-OUT TERMINAL CONNECTORS
Both terminal strips, TB1 and TB2, have removable plug-in connectors. The upper connector for TB1 has
screw lugs 1 through 12 and the lower connector has screw lugs 13 through 22. All of the screw lugs are on a
single connector for TB2. To remove a signal connector, grasp it securely on both sides with the thumb and
forefinger, rock it gently from top to bottom (not side to side) and pull it straight out. To remove the power
connector, grasp the sides firmly with the thumb and forefinger, rock it gently from side to side and pull
straight out.
NOTE: The screw lugs on the back of the instrument are designed for 12 – 24 AWG wire. It is
important that the wire be stripped to expose 1/2 inch of conductor before installation.
WARNING! Instruments that are powered from an ac line service constitute a potential
electric shock hazard to the user. Make certain that these system ac power lines are
disconnected from the operating branch circuit before attempting electrical interconnections.

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Figure 2-4. Controller Rear Power and Signal Terminal Boards

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53SL5100B Single-Loop Controller
INSTRUCTION MANUAL
Figure 2-5. Datalink Installation Diagram

53SL5100B Single-Loop Controller
INSTRUCTION MANUAL
2.4.1 Power Wiring
Refer to the instrument model number to verify the power input requirements:
53SL511…. – AC Power
53SL512…. – DC Power
2.4.1.1 DC Power
Reference Figure 2-4 and connect the remote 24 V dc power supply to the instrument as follows:
1. Connect (+) input line, via remote SPST switch, to terminal L1.
2. Connect (-) input line to the system bus bar. The bus bar should be connected to a good earth ground
(#8 AWG wire is recommended). Individual wires should be run from the controller Power Common
(PC ) and Signal Common (SC ) terminals to the bus bar. The chassis should be grounded by
connecting terminal G to earth ground.
NOTE: Use of a common bus bar is recommended to minimize potential
voltage differences that may occur as the result of ground current loops, e.g.,
potential difference between separate signal grounds, power grounds, etc.
2.4.1.2 AC Power
Reference Figure 2-4 and connect the specified line service (110-120, 220-240 V ac, 50 or 60 Hz) to the
instrument as follows:
1. Connect the phase or hot line L, via a remote power disconnect switch or circuit breaker, to terminal
L1.
2. Connect the neutral line N to terminal L2 for 110-120 V ac. Connect the neutral line N to terminal L3
for 220-240 V ac.
3. Connect Power Common to a good earth ground (#12 AWG wire is recommended). The instrument
case should be grounded by connecting terminal G to earth ground at the source of supply
(green/green-yellow ground).
All supply connections include surge protection rated at 275 V ac normal mode.
NOTE: To minimize possible interference, ac power wiring should be routed away from signal
wiring.
2.4.2 Field Signal Wiring
2.4.2.1 Current/Voltage Input to AIN0 and AIN1
When the input signal is from a 4-20 mA current transmitter, a precision 250 ohms (+/-0.1%) resistor is
required. (The resistor tolerance is critical, as the resistor is used to accurately convert the current signal from
the transmitter, which is typically 4-20 mA, to a specified analog input voltage of 1 to 5 V dc). The back of the
rear terminal board has the appropriate resistors (R1 and R2, respectively) for ANI0 and ANI1.
2.4.2.2 Contact Input to CCI0
Separate contact input signals to CCI0 and CCI1 can be used for alarm inputs. One side of each
remote contact must be connected to power common as illustrated in Figure 2-4. Minimum opened
or closed recognition time for a remote contact must be 0.05 seconds.
2.4.2.3 Current Output from ANO0
A current output signal is available for re-transmission of one of the input signals ANI0 through
ANI3. Observe the proper polarity when connecting the output to another instrument.
2.4.2.4 Contact Output CCO0
Discrete contact output CCO0 is identified in Figure 2-4. Each discrete output is a solid state switch with a
rating of 30 V dc, 50 mA maximum. A CCO is referenced to power common. When this contact is connected
to an inductive load, an external arc suppression network is required for contact protection.
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2.4.3 Datalink Communication
Datalink is an interrogator/responder serial interface capable of supporting 32 instruments on a single
network. It uses an RS485 physical interface. The Datalink wiring diagram for this instrument is provided as
Figure 2-5. Complete coverage of the Datalink is provided in Instruction Bulletin 53SU5000.
2.5 Factory Set Calibration
Each unit contains individual factory set entries that calibrate the four analog inputs (ANI0 through ANI3) and
analog output (ANO0). There is a calibration sheet supplied with each instrument that should be retained for
future reference when the installation is completed. Reference Section 5.3 for additional information.
2.6 Grounding
Installations are expected to have access to an independent, high quality, noise-free point of earth reference.
The system should be connected by a dedicated, low resistance (less than one ohm) lead wire directly to the
installation’s point of earth reference. This ground reference is referred to as the Instrumentation Ground. If
an instrumentation ground reference does not exist in the installation, an earth ground electrode should be
established with an independent grounding rod or ground grid mesh.

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